361/360
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| Ratio | 361/360 |
| Subgroup monzo | 2.3.5.19 [-3 -2 -1 2⟩ |
| Size in cents | 4.8023167¢ |
| Names | go comma, dudon comma |
| Color name | 19oog2, nonogu 2nd, Nonogu comma |
| FJS name | [math]\text{d2}^{19,19}_{5}[/math] |
| Special properties | square superparticular, reduced |
| Tenney height (log2 nd) | 16.9877 |
| Weil height (log2 max(n, d)) | 16.9917 |
| Wilson height (sopfr(nd)) | 55 |
| Harmonic entropy (Shannon, [math]\sqrt{nd}[/math]) |
~1.41106 bits |
| Comma size | small |
| S-expression | S19 |
| open this interval in xen-calc | |
361/360, the go comma or dudon comma, also described as the undevicesimal semitones comma, is a 19-limit (also 2.3.5.19 subgroup) superparticular comma of about 4.8 cents. It is the difference between 19/18 and 20/19, the two undevicesimal semitones, as well as between 19/15 and 24/19, the two undevicesimal major thirds. It is also the difference between two stacked 19/18 and 10/9. By tempering it out is defined the dudon temperament, which enables the dudon chords.
Etymology
The name go comma was named by Xenwolf in 2013. It is so named after go board, which has a 19×19 grid.